Insecticide



Patented July 21, 1-931 UNITED STATES mm wnscnn m) Kazan nnonnnsnn, or n or xrnn xnonsnaenn, GERMANY, .ASSIGNO PATENT OFFICE an m ANHALT, AND WERNER Ex'r, TO WINTHBOP CHEMICAL cont.

PANY, INQ, OF NEW YORK. N. Y., A CORPORATION OF NEW YORK msncncmn No Drawing. Application filed May 31, 1928, Serial No. 282,038, and in Germany August 9, 1926.

In our application filed on the same day We have described new insecticides contain-' active insecticides.

ing monothiocyanates of the aromatic series.

Our present invention is based upon the discovery that organic polythiocyanates, the derivatives and substitution products of these ,thiocyanates are also extraordinarily These polythiocyanates may be derived from the aliphatic or from the aromatic series; individual insecticides according to this invention are, for example,

. ethylene dithiocyanate, styroldithiocyanate,

dithiocyanodiphenylamine and so on.

As compared with the aliphatic monosulfocyanideswhich are easily volatil and, in consequence of their unbearable pungent smell, cannot come into practical consideration, the comparatively diflicultly volatil polythiocyanates defined abovehave the advantage that they are effective for a relatively 101:2" period and are not excluded from use by their odor.

The activity of these insecticides exceeds considerably that of insecticides hitherto known. They do not damage'plants; they di henylamine.

HANS WESCHE. KARL BRODERSEN. WERNER nx'r.

may be applied-in any desired manner, for

example, by scattering in conjunction with the usual diluents, by fumigationor by spraying in the form of a solution or emulsion.

The following example illustrates the invention: I

EwampZe.-A mixture of 5 partsrof ethylenedithiocyanate and 95 parts of talc are mixed to form a dusting agent, This suflices to kill in a very short time the larvae and imagines ofPiesma quadrata, which hitherto has not been possible with any synthetic agent. Y

The sameaction is obtained by use of other organic polythiocyanates, for example, styroldithiocyanate,' dithiocyanodiphenylamme. Y

By spraying a solution or an emulsion of the polythiocyanates of the organic series the same effect is obtained; the solutions or emulsions may be in a very dilute state. The efieetive polythiocyanates maybe used in a mixture with other known insecticides. What we claim is: I

1. As an insecticide a preparation cons an insecticide a preparation contestimony whereof, we afiix our signa- .tures. 

